Add -o /dev/null to some tests which don't care about their output.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102722 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/FrontendC++/2009-07-16-Using.cpp b/test/FrontendC++/2009-07-16-Using.cpp
index 1acadf6..c0e0314 100644
--- a/test/FrontendC++/2009-07-16-Using.cpp
+++ b/test/FrontendC++/2009-07-16-Using.cpp
@@ -1,4 +1,4 @@
-// RUN: %llvmgxx %s -S
+// RUN: %llvmgxx %s -S -o /dev/null
 
 namespace A {
   typedef int B;